Air rivet-bucker



C. C, BAILEY. AIR RIVET BUCKER. APPLICATION FILED 'FEB. 24, 1919.

Patented Dec. 28, 1920.

INVENTQR. 6Z2 M22266 6'34 zZe ATTORNEY.

AIR BIVET-BUCKER.

Specification of Letters Patent.

Patented Dec. 28, 1920..

Application filed. February 24, 1919. Serial No. 278,868.

all in 710m it may concern:

Be it known that I, CLARENCE C. BAILEY, citizen of the United States,residing at ington, in the county of Huntington and State of Indiana,have invented certain new and useful improvements in Air Rivetllucirers, of which the following is a speciiication.

The invention provides means for backing or supporting a rivet whenupsetting the end thereof. In accordance with the in vention a novelform of device is provided, the same being designated in the trade as arivet backer.

The invention has for its object to provide a rivet bucker which isextensible so as to meet all conditions and which when in position doesnot require to be held or si'ipported by hand and which may be readilydetached after the rivet has been properly set so as to be properlypositioned for supporting the next rivet.

The drawing illustrates a preferred em bodiment of the invention.However, it is to be understood that in adapting the same to meetdifferent conditions, various changes in the form, proportion, and minordetails of construction may be resorted to without v i'leparting fromthe nature of the invention as claimed hereinafter.

in the drawing hereto attached,

Figure 1 is a central longitudinal section of a rivet bucker embodyingthe invention showing the same collapsed.

Fig. 2 is an end view.

big. 3 is a view similar to Fig. 1 showing the relation of the partswhen extended.

orresponding and like parts are referred to in the following descriptionand indicated in the several views of the drawing by like referencecharacters.

The appliance or bucker comprises a plurality of sections having atelescopic arrangement and adapted to be extended by fluid pressure, themovable sections having piston heads for confining the fluid andpreventing escape thereof. As shown the device comprises three sections1, 2 and 3 disposed one within the other and having a piston. tip andadapted to be extended by fluid pressure. The several sections arepreferably of cylindrical form. The main section 1 is closed at itslower end by means of a cap l: which is screwed therein. The upper endof the section 1 has an inner flange 5 which constitutes a stop to limitthe extension of the section 2 and to form a guide to maintain thesection 2 in concentric arrangement with the section 1. A longitudinalpassage 6 is provided at one Side of the section 1 and opens at itslower end into the section, as indicated at 7 The upper end of thepassage 6 is closed by means of a plug 8. A hose pipe 9 connects withthe upper portion of the passage 6 and leads from a suitable source offluid pressure supply such as compressed air, steam or the like. A valve10 is located in the length of the passage 6 at a point between theinlet 9 and the outlet '7. When the valve 10 is open the fluid pressurehas unobstructed passage into the lower end of the section 1 so as toeffect extension of the the sections and holding of the device inoperative position.

The section 2 is provided at its lower end with a piston which comprisesa packing 11 and confining shoulders 12 and 13. The shoulder 12 ispreferably formed as a part of a section 2 and the shoulder 13 is partof a wing which is threaded to the end portion of the section 2 beyondthe shoulder 12. The upper end of the section 2 has an inner flange 1which performs the same office as the flange 5.

The section 3 is provided at its lower end with pistons 15 which obtaina snug fit within the section 2. The upper end of the section 3 isclosed and recessed to conform to the head of the rivet which obtains aseat therein when the device is in operative position.

The several sections may be of any relative length and are of suchconstruction as to provide a substantial appliance and one that may bereadily and conveniently handied. The hose pipe 9 is connected with atank containing compressed air or with any source of fluid pressuresupply.

is arranged so that one end of the section 1 engages a suitable supportafter which the valve 10 is opened, thereby permitting the fluidpressure to pass into the sections 1 and 2 and extend the same so as tocause the outer end of the section 3 to engage the rivet, the devicebeing retained in position by fluid pressure which is supplied to thedevice as long as the same is in operative position. A fter the rivethas been upset the fluid pressure is cut off by closing the valve 10when the sections will collapse and thereby per- After a rivet has beenplaced in position the device 1" mit the removal of the device and itsready adjustment to the neXt rivet to be set.

It is to be understood that provision is had for escape of the fluidpressure to admit of the device collapsing. The valve 10 is of thetwo-Way type and in the position shown in Fig. 3 admits of fluidpressure passing from the pipe 9 through the passage 6 into the loWerend of the section 1. When'the valve 10 is turned to occupy a positionindicated in Fig. 1 the pressure Within the device is relieved andpermitted to escape so that the sections maybe telescoped to admit ofthe device being removed and again applied to the required position. foruse.

The foregoing description and the drawing have reference to What may beconsidered the preferred, or approved, form of my invention. It is to beunderstood that I may make such changes in construction and arrangementand combination of parts, materials, dimensions, et cetera, as may proveexpedient and fall Within the scope of the appended claim.

Having thus fully described my invention,

what I claim as new and desire to secure by Letters Patent is 2- A rivetbucker, comprising an outer section having an inner flange at one endand a longitudinal passage at one side opening into the opposite end, acap closing the latter end and having a recess in communication With thepassage, an intermediate section open throughout its length telescopingwith the outer section and having an inner flange at its outer end andan annularpiston at its inner end, an inner'section closed at its endsand telescoping with the intermediate section and having a solid pistonat its inner end, and a valve in said side passage for controlling theadmission of a motivemedium to the device or exhausting the sametherefrom.

l n testimony whereof I aifix my signature in presence of two Witnesses.

HARRY P. BASTROM, O. M. Goes.

